Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires league/commonmark ^2.7 -> satisfiable by league/commonmark[2.7.0, 2.7.1]. - league/commonmark[2.7.0, 2.7.1] require league/config ^1.1.1 -> satisfiable by league/config[v1.1.1, v1.2.0]. - league/config[v1.1.1, v1.2.0] require nette/schema ^1.2 -> satisfiable by nette/schema[v1.2.0, v1.2.1, v1.2.2, v1.2.3, v1.2.4, v1.2.5, v1.3.0, v1.3.2]. - nette/schema[v1.2.0, v1.2.1] require php >=7.1 <8.1 -> your php version (8.5.0-dev) does not satisfy that requirement. - nette/schema v1.2.2 requires php >=7.1 <8.2 -> your php version (8.5.0-dev) does not satisfy that requirement. - nette/schema v1.2.3 requires php >=7.1 <8.3 -> your php version (8.5.0-dev) does not satisfy that requirement. - nette/schema[v1.2.4, v1.2.5] require php 7.1 - 8.3 -> your php version (8.5.0-dev) does not satisfy that requirement. - nette/schema v1.3.0 requires php 8.1 - 8.3 -> your php version (8.5.0-dev) does not satisfy that requirement. - nette/schema v1.3.2 requires php 8.1 - 8.4 -> your php version (8.5.0-dev) does not satisfy that requirement.